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FOC | Family List | FOC Vol. 4 | Betulaceae | Ostrya

5. Ostrya yunnanensis Hu ex P. C. Li, Acta Phytotax. Sin. 17(1): 87. 1979.

云南铁木 yun nan tie mu

Trees to 20 m tall; bark dark gray. Branchlets purplish brown, striate, densely pubescent, glabrescent. Petiole 5-10 mm, densely yellow tomentose; leaf blade lanceolate or oblong-lanceolate, 5-10 × 2-2.5 cm, abaxially densely yellow tomentose, bearded in axils of lateral veins, adaxially sparsely pilose, base cuneate, rarely subrounded, margin doubly mucronate serrate, apex caudate-acuminate; lateral veins 18-20 on each side of midvein, 4-5 mm apart. Female inflorescence erect, densely racemose, 4-6 cm; peduncle ca. 2 cm, densely yellow tomentose; bracts ovate-elliptic, saccate, 1.5-2 cm × 7-9 mm, membranous, appressed pilose, base rounded, setose, apex acute, mucronate; veins reticulate. Nutlet light brown, ovoid-ellipsoid, 6-7 × ca. 3 mm, glabrous except villous at apex, ribbed. Fl. Jun-Jul, fr. Jul-Aug.

* Moist forests; circa 2600 m. NW Yunnan (Luquan Xian)


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